doxygen + remove break


git-svn-id: https://gnunet.org/svn/gnunet@31057 140774ce-b5e7-0310-ab8b-a85725594a96
fix uninitialized memory in network send


git-svn-id: https://gnunet.org/svn/gnunet@31058 140774ce-b5e7-0310-ab8b-a85725594a96